Boot up into safe mode and see if the computer works. Do this by pressing F8 just before the windows logo comes up at start up. If it does work uninstall Jukebox MusicMatch while your in safe mode, then restart and boot into windows normaly.

Minidump file - Its a small log file that windows creats whenever your PC crashes, if you have that enabled (most likely)

C:\Windows\Minidump - Directory where they're stored. So in other words, Open up My computer then double click the C drive then find the Windows Folder and enter that and lastly the Minidump folder.

Then when you want to 'attach' them to your next post, click on the "Post Reply" button on the end of the thread and write your message, and somewhere there is "Manage Attatchments". From there upload them and i think from there you should be able to figure things out

FYI: you can also do this while in safe mode as well, if you cant do it from normal windows..